Posted by Alec W. (2.25.206.166) on May 09, 2022 at 10:14:38:
In Reply to: Help translating the mark? posted by DavidK on May 09, 2022 at 02:21:25:
It's an editioning seal, indicating the size of the edition (here 250 impressions) and leaving space for the position of this impression in the edition (here left blank).
貮百五拾枚絶版
第 番
nihyakugojū mai zeppan / dai ___ ban
Another example:
https://www.scholten-japanese-art.com/japanese_prints_2-28.php
-A